120129729 has 8 divisors (see below), whose sum is σ = 160225152. Its totient is φ = 80060400.

The previous prime is 120129719. The next prime is 120129731. The reversal of 120129729 is 927921021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 120129729 - 2⁷ = 120129601 is a prime.

It is a super-2 number, since 2×120129729² = 28862303579226882, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 120129729.

It is not an unprimeable number, because it can be changed into a prime (120129719) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10779 + ... + 18879.

It is an arithmetic number, because the mean of its divisors is an integer number (20028144).

Almost surely, 2^120129729 is an apocalyptic number.

It is an amenable number.

120129729 is a deficient number, since it is larger than the sum of its proper divisors (40095423).

120129729 is an equidigital number, since it uses as much as digits as its factorization.

120129729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13047.

The product of its (nonzero) digits is 4536, while the sum is 33.

The square root of 120129729 is about 10960.3708422662. The cubic root of 120129729 is about 493.4200948675.

The spelling of 120129729 in words is "one hundred twenty million, one hundred twenty-nine thousand, seven hundred twenty-nine".